The town has advised property owners that first-quarter real estate taxes are due on Aug. 1. The town tax collector's office, at 7 Widger Road, will be open until 6 p.m. on Aug. 1. Taxes can be mailed to the Tax Collector, PO Box 3, Marblehead, MA. 01945. For more information, call the office at 781-631-0587.